4000s Stalling

Ti Kan ti at amb.org
Fri Nov 2 14:48:44 EST 2001

Chris Jones writes:
> It start's fine and will idle without any problem. But as soon as you put it
> in gear(Drive) it will take about 30 seconds and begin to surge and misfiring
> before stalling. I took it to a mechanic and he told me it was the fuel
> distributor. I purchase(the whole top half of the air box) a used one and it
> run better for 5 minutes, but still the same problem. Also done a tune up(cap,
> rotor, plugs, air filter, fuel filter (both), and also a new fuel line (filter
> to engine bay). This problem is so strange, but to top it all off late at
> night/early morning during low tempatures it will run great. Any help to fix
> this problem?

Check the intake system thoroughly for air leaks....  The big rubber boot,
all vacuum and crankcase ventilation hoses, idle stabilizer valve hoses, etc.
You should also remove the valve and thoroughly clean the innards with
carburetor cleaner.

01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
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